JP2000116044A - Permanent magnet motor - Google Patents
Permanent magnet motorInfo
- Publication number
- JP2000116044A JP2000116044A JP10274654A JP27465498A JP2000116044A JP 2000116044 A JP2000116044 A JP 2000116044A JP 10274654 A JP10274654 A JP 10274654A JP 27465498 A JP27465498 A JP 27465498A JP 2000116044 A JP2000116044 A JP 2000116044A
- Authority
- JP
- Japan
- Prior art keywords
- rotor core
- permanent magnet
- slit
- core
- rotor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、エアコンや冷蔵
庫の圧縮機駆動用のモータ等に使用される永久磁石型モ
ータに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a permanent magnet motor used for a motor for driving a compressor of an air conditioner or a refrigerator.
【０００２】[0002]
【従来の技術】近年、エアコンや冷蔵庫の圧縮機モータ
などでは、回転数の制御が容易で、モータ効率の良い永
久磁石型モータが一般的に使用されている。図６、図７
に現在最も一般的に利用されている永久磁石モータにつ
いて説明する。2. Description of the Related Art In recent years, permanent magnet type motors which are easy to control the number of revolutions and have high motor efficiency are generally used for compressor motors of air conditioners and refrigerators. 6 and 7
A description will now be given of the most commonly used permanent magnet motor.
【０００３】図６は、従来の永久磁石型モータの横断面
図である。図において、１は回転子、２は固定子、３は
回転子１に設けられた磁石挿入孔で、ここに永久磁石４
が挿入されている。FIG. 6 is a cross-sectional view of a conventional permanent magnet type motor. In the figure, 1 is a rotor, 2 is a stator, 3 is a magnet insertion hole provided in the rotor 1, and a permanent magnet 4
Is inserted.
【０００４】このように、回転子鉄心内部に複数の永久
磁石を収容した永久磁石型モータでは、モータ運転時の
固定子電流による電機子反作用によって生じる磁束の乱
れを緩和し、モータ効率の改善やトルクリップルの低減
を目的とし、図６のように回転子鉄心６に設けられた磁
石挿入孔３の外周側、回転子鉄心磁極部７にスリット５
を設けることがある。従来このスリット５は、図７に示
す縦断面図のように、回転子鉄心６の軸方向全体にわた
って同形状で設けられていた。As described above, in a permanent magnet type motor in which a plurality of permanent magnets are accommodated inside a rotor core, disturbance of magnetic flux caused by armature reaction caused by stator current during motor operation is reduced, and motor efficiency is improved. For the purpose of reducing the torque ripple, a slit 5 is formed on the outer peripheral side of the magnet insertion hole 3 provided in the rotor core 6 as shown in FIG.
May be provided. Conventionally, the slit 5 is provided in the same shape over the entire axial direction of the rotor core 6 as shown in a vertical sectional view shown in FIG.
【０００５】また、前述のような永久磁石型モータにお
いて、回転子鉄心６の軸方向の巾を固定子鉄心８に対し
長くすることにより、効率を改善するという手段を用い
ることがある。これは、前述のような永久磁石型モータ
では、回転子鉄心６に回転子鉄心磁極部７を持つため、
回転子鉄心６の軸方向の巾を固定子鉄心８に対し長くす
ると、回転子鉄心オーバーハング部１０ａ，１０ｂの永
久磁石外周面より生じる磁束が、前記回転子磁極部７を
通り固定子鉄心８に有効磁束として働くためである。但
し、有効磁束量とオーバーハング部長さの関係は図８の
通りであり、回転子鉄心磁極部７の磁束が飽和するた
め、オーバーハング部の長さが一定の長さに達すると、
有効磁束量は飽和する。この有効磁束が飽和するオーバ
ーハング部長さは、回転子鉄心磁極部７の断面積、永久
磁石の磁束量および鉄心の材料に依存するため、回転子
鉄心の形状等により異なる。In the above-described permanent magnet type motor, there is a case where a means for improving the efficiency by increasing the axial width of the rotor core 6 relative to the stator core 8 is used. This is because, in the permanent magnet type motor as described above, the rotor core 6 has the rotor core magnetic pole portion 7,
When the axial width of the rotor core 6 is made longer than that of the stator core 8, the magnetic flux generated from the outer peripheral surfaces of the permanent magnets of the rotor core overhang portions 10a and 10b passes through the rotor magnetic pole portion 7 and the stator core 8 This is because it works as an effective magnetic flux. However, the relationship between the effective magnetic flux amount and the length of the overhang portion is as shown in FIG. 8, and since the magnetic flux of the rotor core magnetic pole portion 7 is saturated, when the length of the overhang portion reaches a certain length,
The effective magnetic flux is saturated. The length of the overhang portion at which the effective magnetic flux is saturated depends on the cross-sectional area of the rotor core magnetic pole portion 7, the amount of magnetic flux of the permanent magnet, and the material of the core, and therefore differs depending on the shape of the rotor core.
【０００６】[0006]
【発明が解決しようとする課題】従来の永久磁石型モー
タは以上のように構成されているので、固定子鉄心８よ
り回転子鉄心６を長くする手段を用いた場合、回転子鉄
心磁極部７にスリット５を設けると、スリット５を設け
ない場合に比べ回転子鉄心磁極部７の断面積が減少する
ため、磁束飽和に達するオーバーハング部長さが短くな
ってしまう。その結果、スリット５を設けない場合に比
べトルクに作用する有効磁束が減少し、モータ効率が悪
化するという問題点があった。Since the conventional permanent magnet type motor is constructed as described above, if a means for making the rotor core 6 longer than the stator core 8 is used, the rotor core magnetic pole part 7 is not used. When the slit 5 is provided, the cross-sectional area of the rotor core magnetic pole portion 7 is reduced as compared with the case where the slit 5 is not provided, so that the length of the overhang portion reaching the magnetic flux saturation becomes short. As a result, there is a problem that the effective magnetic flux acting on the torque is reduced as compared with the case where the slit 5 is not provided, and the motor efficiency is deteriorated.
【０００７】この発明は、かかる問題点を解消するため
になされたもので、磁束飽和に達するオーバーハング部
長さを長くすることができ、スリットの効果を維持した
まま有効磁束を増加することができ、高効率化が図れる
永久磁石型モータを提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and it is possible to increase the length of an overhang portion reaching magnetic flux saturation, and to increase the effective magnetic flux while maintaining the effect of the slit. It is another object of the present invention to provide a permanent magnet type motor that can achieve high efficiency.
【０００８】[0008]
【課題を解決するための手段】この発明に係る永久磁石
型モータは、コイルが巻回された円筒状の固定子鉄心の
内側に、回転子鉄心を配置し、回転子鉄心は複数の磁石
挿入孔を有し、この磁石挿入孔に永久磁石を収容し、磁
石挿入孔の外周側回転子鉄心磁極部にスリットを有し、
回転子鉄心が前記固定子鉄心より回転軸方向に長い構造
の永久磁石型モータにおいて、固定子鉄心に対し回転子
鉄心がオーバーハングした回転子鉄心オーバーハング部
側における回転軸方向の回転子鉄心端部は、回転子鉄心
中心部よりも漸次スリットの回転子鉄心磁極部当たりの
面積を小さくしたものである。A permanent magnet type motor according to the present invention has a rotor core disposed inside a cylindrical stator core around which a coil is wound, and the rotor core includes a plurality of magnets inserted therein. Having a hole, a permanent magnet is housed in this magnet insertion hole, and a slit is provided in the outer peripheral rotor core magnetic pole portion of the magnet insertion hole,
In a permanent magnet type motor having a structure in which the rotor core is longer in the rotation axis direction than the stator core, the rotor core end in the rotation axis direction on the side of the rotor core overhang portion where the rotor core overhangs the stator core. The portion has a gradually decreasing area of the slit per rotor core magnetic pole portion as compared with the central portion of the rotor core.
【０００９】また、回転子鉄心オーバーハング部側にお
ける回転軸方向の回転子鉄心端部には、スリットを設け
ないものである。Further, no slit is provided at an end of the rotor core in the rotation axis direction on the rotor core overhang portion side.
【００１０】また、スリットの回転子鉄心磁極部当たり
の面積を小さくする手段として、スリット数を減少させ
るものである。[0010] As a means for reducing the area of the slit per rotor core magnetic pole portion, the number of slits is reduced.
【００１１】また、スリットの回転子鉄心磁極部当たり
の面積を小さくする手段として、スリット巾を狭くさせ
るものである。As means for reducing the area of the slit per rotor core magnetic pole portion, the slit width is reduced.
【００１２】また、回転子鉄心が固定子鉄心に対し両端
でオーバーハングするよう配置したものである。Further, the rotor core is arranged so as to overhang at both ends with respect to the stator core.
【００１３】また、固定子鉄心の回転軸方向の中心と、
回転子鉄心の回転軸方向の中心をオフセットして配置
し、回転子鉄心オーバーハング部の長い側における回転
軸方向の回転子鉄心端部のみ回転子鉄心中心部よりも漸
次スリットの回転子鉄心磁極部当たりの面積を小さくし
たものである。Further, the center of the stator core in the rotation axis direction is
The center of the rotor core in the rotation axis direction is offset, and only the rotor core end in the rotation axis direction on the longer side of the rotor core overhang portion has a rotor core magnetic pole of a slit that is gradually slitter than the rotor core center. The area per part is reduced.
【００１４】また、回転子鉄心が固定子鉄心に対し片端
でオーバーハングするよう配置したものである。The rotor core is arranged so as to overhang at one end with respect to the stator core.
【００１５】[0015]
【発明の実施の形態】実施の形態１．以下、この発明の
実施の形態１を図面を用いて説明する。図１は、この発
明の実施の形態１を示す永久磁石型モータの縦断面図で
ある。図において、１は回転子であり、回転子鉄心６、
永久磁石４、スリット５、永久磁石の飛散を防ぐ端板１
１で構成されている。回転子鉄心６はプレス抜きされた
薄板鋼板で積層されており、永久磁石４はＮ極とＳ極が
交互に配置されている。２は固定子であり、固定子鉄心
８、固定子巻線９で構成され、固定子鉄心は回転子鉄心
と同様、プレス抜きされた薄板鋼板で積層されている。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of a permanent magnet type motor according to Embodiment 1 of the present invention. In the figure, reference numeral 1 denotes a rotor, and a rotor core 6,
Permanent magnet 4, slit 5, end plate 1 for preventing scattering of permanent magnet
1. The rotor core 6 is laminated with a pressed thin steel plate, and the permanent magnet 4 has N poles and S poles alternately arranged. Reference numeral 2 denotes a stator, which includes a stator core 8 and a stator winding 9. The stator core is, like the rotor core, laminated by press-cut thin steel plates.
【００１６】図１のように、回転子鉄心６の回転軸方向
の巾を固定子鉄心８に対し長くすると、回転子鉄心オー
バーハング部１０ａ，１０ｂが生じる。前述のような永
久磁石型モータでは、回転子鉄心６に図６で示すように
回転子鉄心磁極部７を持つため、回転子鉄心オーバーハ
ング部１０ａ，１０ｂの永久磁石４による磁束は、回転
子鉄心磁極部７を通り固定子鉄心８を通る磁気回路を形
成する。その結果、回転子鉄心オーバーハング部１０
ａ，１０ｂを持たないモータに比べ、トルクに働く有効
磁束が増加し、モータ効率が改善される。As shown in FIG. 1, when the width of the rotor core 6 in the rotation axis direction is made longer than that of the stator core 8, rotor core overhang portions 10a and 10b are generated. In the above-described permanent magnet type motor, since the rotor core 6 has the rotor core magnetic pole portion 7 as shown in FIG. 6, the magnetic flux of the permanent magnets 4 of the rotor core overhang portions 10a and 10b is A magnetic circuit is formed through the core magnetic pole 7 and the stator core 8. As a result, the rotor core overhang 10
The effective magnetic flux acting on the torque is increased as compared with the motor having no a and 10b, and the motor efficiency is improved.
【００１７】前記回転子鉄心磁極部の飽和磁束量は、磁
極部の面積、永久磁石の磁束量および鉄心の材料により
決定する。そのため、必要以上にオーバーハング部を長
くしても磁束飽和により、十分な効果は得られない。前
述の効果を最大限に利用するには、オーバーハング部長
さを磁束飽和直前に設定するのが効果的である。The saturation magnetic flux of the rotor core magnetic pole is determined by the area of the magnetic pole, the magnetic flux of the permanent magnet, and the material of the iron core. Therefore, even if the overhang portion is made longer than necessary, a sufficient effect cannot be obtained due to magnetic flux saturation. In order to make the most of the above-mentioned effect, it is effective to set the length of the overhang portion immediately before magnetic flux saturation.
【００１８】また、上述のような、回転子鉄心内部に複
数の永久磁石を収容した永久磁石型モータでは、モータ
運転時の固定子電流による電機子反作用によって生じる
磁束の乱れを緩和し、モータ効率の改善やトルクリップ
ルの低減を目的とし、前記スリット５を設けることがあ
る。Further, in the permanent magnet type motor in which a plurality of permanent magnets are accommodated in the rotor core as described above, the disturbance of the magnetic flux caused by the armature reaction caused by the stator current during motor operation is reduced, and the motor efficiency is reduced. The slit 5 may be provided for the purpose of improving the torque and reducing the torque ripple.
【００１９】従来は、図７に示すように、軸方向全体に
スリット５を設けていた。この場合、回転子鉄心オーバ
ーハング部１０ａ，１０ｂでは、スリット５により回転
子鉄心磁極部７の面積が減少するため、飽和磁束量はス
リット５なし時に比べ減少する。スリット５の目的は、
固定子巻線９と永久磁石４の磁束による電機子反作用の
緩和であるが、固定子巻線９による磁束は、回転子鉄心
オーバーハング部１０ａ，１０ｂにはほとんど影響しな
い。そのため本実施の形態では、この電機子反作用の影
響の小さい回転子鉄心オーバーハング部１０ａ，１０ｂ
の一部分のみスリット５を設けないようにした。Conventionally, as shown in FIG. 7, a slit 5 is provided in the entire axial direction. In this case, in the rotor core overhang portions 10a and 10b, since the area of the rotor core magnetic pole portion 7 is reduced by the slit 5, the saturation magnetic flux amount is reduced as compared with the case where the slit 5 is not provided. The purpose of the slit 5 is
Although this is to alleviate the armature reaction caused by the magnetic flux of the stator winding 9 and the permanent magnet 4, the magnetic flux of the stator winding 9 hardly affects the rotor core overhang portions 10a and 10b. Therefore, in the present embodiment, rotor core overhang portions 10a, 10b that are less affected by the armature reaction
The slit 5 was not provided only in a part of the.
【００２０】この結果、従来の回転子鉄心オーバーハン
グ部１０ａ，１０ｂ全体にスリット５入りのものに対
し、回転子鉄心磁極部７の面積が増加し、回転子オーバ
ーハング部回転子鉄心をより長くとれることにより、ス
リット５の効果を維持したまま有効磁束が増加でき、高
効率化を図ることが可能となった。As a result, the area of the rotor core magnetic pole portion 7 is increased as compared with the conventional rotor core overhang portions 10a, 10b having slits 5 as a whole, and the rotor overhang portion rotor core is made longer. As a result, the effective magnetic flux can be increased while maintaining the effect of the slit 5, and high efficiency can be achieved.
【００２１】実施の形態２．以下、この発明の実施の形
態２を図面を参照して説明する。図２は、この発明の実
施の形態２を示す永久磁石型モータの縦断面図である。
本実施の形態は、実施の形態１に対し回転子鉄心オーバ
ーハング部１０ａ，１０ｂの内の片側１０ａのみスリッ
ト５を設けないようにしたことを特徴とする永久磁石型
モータである。Embodiment 2 FIG. Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. FIG. 2 is a longitudinal sectional view of a permanent magnet motor according to Embodiment 2 of the present invention.
The present embodiment is a permanent magnet type motor in which the slit 5 is not provided only on one side 10a of the rotor core overhang portions 10a, 10b as compared with the first embodiment.
【００２２】圧縮機用モータでは、回転子１が回転子１
上下の圧力差により受ける力を緩和させる為に、固定子
２と回転子１を軸方向にオフセットして設置し、磁気推
力を利用することが一般的に行われている。そのため、
回転子鉄心オーバーハング部１０ａと１０ｂは回転軸方
向の長さが異なる。In the compressor motor, the rotor 1 is
In order to reduce the force received by the vertical pressure difference, it is common practice to install the stator 2 and the rotor 1 offset in the axial direction and use the magnetic thrust. for that reason,
The rotor core overhang portions 10a and 10b have different lengths in the rotation axis direction.
【００２３】前述の通り、本発明の目的は回転子鉄心オ
ーバーハング部のスリット５を廃し、磁束を有効に利用
することであるが、回転子鉄心オーバーハング部の長さ
が異なる場合、その短い方では磁束の飽和に達していな
い為、スリット５が入っていても磁気回路に流れる磁束
は変わらない場合がある。そこで、回転子鉄心オーバー
ハング部の長い方のみスリットを廃し、実施の形態１の
効果はそのままで、回転子重量が軽くなるので、回転子
の振れ回り等による負荷を減少することに対し有効なも
のとなる。As described above, the object of the present invention is to eliminate the slit 5 of the rotor core overhang and to effectively use the magnetic flux. On the other hand, since the magnetic flux does not reach saturation, the magnetic flux flowing through the magnetic circuit may not change even if the slit 5 is formed. Therefore, the slit is eliminated only on the longer side of the rotor core overhang portion, and the effect of the first embodiment is kept as it is, and the weight of the rotor is reduced. Therefore, it is effective to reduce the load due to the whirling of the rotor. It will be.
【００２４】実施の形態３．以下、この発明の実施の形
態３を図面を参照して説明する。図３は、この発明の実
施の形態３を示す永久磁石型モータの縦断面図である。
本実施の形態は、実施の形態２に対し回転子を片側にの
みオーバーハングするように設置することを特徴とした
永久磁石型モータである。これは、軸方向に対する磁気
吸引力を大きくしたい場合に有効なものである。Embodiment 3 FIG. Hereinafter, a third embodiment of the present invention will be described with reference to the drawings. FIG. 3 is a longitudinal sectional view of a permanent magnet type motor according to Embodiment 3 of the present invention.
The present embodiment is a permanent magnet type motor characterized in that the rotor is installed so as to overhang only on one side with respect to the second embodiment. This is effective when it is desired to increase the magnetic attraction force in the axial direction.
【００２５】また、本実施の形態ではスリットを設けな
い部分が回転子鉄心オーバーハング部長さよりも大きな
場合の一例を示してある。この場合、トルクリップルを
緩和させる効果は弱くなるが、回転子鉄心磁極部面積の
増加により回転子鉄心オーバーハング部を長く設定でき
るため、有効磁束が増加でき、モータ効率の改善に対し
ては有効である。Further, in this embodiment, an example is shown in which the portion where no slit is provided is larger than the length of the rotor core overhang portion. In this case, the effect of reducing the torque ripple is weakened, but the rotor core overhang can be set longer by increasing the rotor core magnetic pole area, so that the effective magnetic flux can be increased and the motor efficiency can be improved. It is.
【００２６】実施の形態４．以下、この発明の実施の形
態４を図面を参照して説明する。図４は、この発明の実
施の形態４を示す永久磁石型モータ回転子の構成図であ
る。本実施の形態は、回転子のスリット数を軸方向で変
えたもので、図４ではＡ部、Ｂ部、Ｃ部では、それぞれ
スリットなし、３本、５本とスリット５の本数が異なっ
ており、回転軸方向の回転子鉄心端部ほどスリット数が
少なくなっている。図４に示す回転子を図１〜３と置き
換えると、実施の形態１〜３と同様の効果が得られる。
図４では回転子鉄心両端でスリット数を変えたものを一
例として挙げているが、実施の形態２および３と同様な
場合等には、片端のみスリット数を変えるようにしても
なんら問題はない。Embodiment 4 Hereinafter, a fourth embodiment of the present invention will be described with reference to the drawings. FIG. 4 is a configuration diagram of a permanent magnet type motor rotor showing a fourth embodiment of the present invention. In the present embodiment, the number of slits of the rotor is changed in the axial direction. In FIG. 4, the number of slits 5 is different from that of A, B, and C in FIG. Thus, the number of slits is smaller at the end of the rotor core in the rotation axis direction. When the rotor shown in FIG. 4 is replaced with FIGS. 1 to 3, the same effects as in the first to third embodiments can be obtained.
FIG. 4 shows an example in which the number of slits is changed at both ends of the rotor core. However, in a case similar to the second and third embodiments, there is no problem even if the number of slits is changed only at one end. .
【００２７】実施の形態５．以下、この発明の実施の形
態５を図面を参照して説明する。図５は、この発明の実
施の形態５を示す永久磁石型モータ回転子の構成図であ
る。本実施の形態は、回転子のスリット巾を軸方向で変
えたもので、図５ではＡ部、Ｂ部、Ｃ部ではそれぞれス
リットの巾が異なっており、回転軸方向の回転子鉄心端
部ほどスリット巾が狭くなっている。図５に示す回転子
を図１〜３と置き換えると、実施の形態１〜３と同様の
効果が得られる。図５では回転子鉄心両端でスリット巾
を変えたものを一例として挙げているが、実施の形態２
および３と同様な場合等には、片端のみスリット巾を変
えるようにしてもなんら問題はない。Embodiment 5 FIG. Hereinafter, a fifth embodiment of the present invention will be described with reference to the drawings. FIG. 5 is a configuration diagram of a permanent magnet type motor rotor showing a fifth embodiment of the present invention. In the present embodiment, the slit width of the rotor is changed in the axial direction. In FIG. 5, the width of the slit is different in each of the portion A, the portion B, and the portion C, and the rotor core ends in the direction of the rotation axis. The slit width becomes narrower. When the rotor shown in FIG. 5 is replaced with FIGS. 1 to 3, the same effects as in the first to third embodiments can be obtained. FIG. 5 shows an example in which the slit width is changed at both ends of the rotor core.
In cases similar to the above cases 3 and 3, there is no problem even if the slit width is changed only at one end.
【００２８】[0028]
【発明の効果】この発明に係る永久磁石型モータは、コ
イルが巻回された円筒状の固定子鉄心の内側に、回転子
鉄心を配置し、回転子鉄心は複数の磁石挿入孔を有し、
この磁石挿入孔に永久磁石を収容し、磁石挿入孔の外周
側回転子鉄心磁極部にスリットを有し、回転子鉄心が前
記固定子鉄心より回転軸方向に長い構造の永久磁石型モ
ータにおいて、固定子鉄心に対し回転子鉄心がオーバー
ハングした回転子鉄心オーバーハング部側における回転
軸方向の回転子鉄心端部は、回転子鉄心中心部よりも漸
次スリットの回転子鉄心磁極部当たりの面積を小さくし
た構成にしたので、固定子巻線電流と回転子永久磁石の
電機子反作用によるトルクリップルを増大させることな
く、磁束を有効に利用し効率改善をはかれる。In the permanent magnet type motor according to the present invention, a rotor core is disposed inside a cylindrical stator core around which a coil is wound, and the rotor core has a plurality of magnet insertion holes. ,
A permanent magnet is housed in the magnet insertion hole, a slit is provided in the outer peripheral rotor core magnetic pole part of the magnet insertion hole, and the rotor core is longer in the rotation axis direction than the stator core. The end of the rotor core in the rotation axis direction on the rotor core overhang portion where the rotor core overhangs the stator core has a larger area of the slit per rotor core magnetic pole part than the center of the rotor core. Since the configuration is reduced, the magnetic flux is effectively used and the efficiency is improved without increasing the torque ripple due to the stator winding current and the armature reaction of the rotor permanent magnet.
【００２９】また、固定子鉄心の回転軸方向の中心と、
回転子鉄心の回転軸方向の中心をオフセットして配置
し、回転子鉄心オーバーハング部の長い側における回転
軸方向の回転子鉄心端部のみ回転子鉄心中心部よりも漸
次スリットの回転子鉄心磁極部当たりの面積を小さくし
た構成にしたので、回転子重量が軽くなるので、回転子
の振れ回り等による負荷を減少することに対し有効なも
のとなる。Further, the center of the stator core in the rotation axis direction is
The center of the rotor core in the rotation axis direction is offset, and only the rotor core end in the rotation axis direction on the longer side of the rotor core overhang portion has a rotor core magnetic pole of a slit that is gradually slitter than the rotor core center. Since the configuration is such that the area per part is reduced, the weight of the rotor is reduced, which is effective for reducing the load due to the whirling of the rotor.
【００３０】また、回転子鉄心が固定子鉄心に対し片端
でオーバーハングするよう配置したことにより、軸方向
に対する磁気吸引力を大きくしたい場合に有効なもので
ある。Further, since the rotor core is arranged so as to overhang at one end with respect to the stator core, it is effective when it is desired to increase the magnetic attraction in the axial direction.
【図１】 この発明の実施の形態１を示す永久磁石型モ
ータの縦断面図である。FIG. 1 is a longitudinal sectional view of a permanent magnet type motor according to Embodiment 1 of the present invention.
【図２】 実施の形態２を示す永久磁石型モータの縦断
面図である。FIG. 2 is a longitudinal sectional view of a permanent magnet type motor according to a second embodiment.
【図３】 実施の形態３を示す永久磁石型モータの縦断
面図である。FIG. 3 is a longitudinal sectional view of a permanent magnet type motor according to a third embodiment.
【図４】 実施の形態４を示す永久磁石型モータ回転子
の構成図である。FIG. 4 is a configuration diagram of a permanent magnet type motor rotor according to a fourth embodiment.
【図５】 実施の形態５を示す永久磁石型モータ回転子
の構成図である。FIG. 5 is a configuration diagram of a permanent magnet motor rotor according to a fifth embodiment.
【図６】 従来の永久磁石型モータの横断面図である。FIG. 6 is a cross-sectional view of a conventional permanent magnet type motor.
【図７】 従来の永久磁石型モータの縦断面図である。FIG. 7 is a longitudinal sectional view of a conventional permanent magnet type motor.
【図８】 永久磁石型モータの有効磁束とオーバーハン
グ部長さの関係の一例を示す図である。FIG. 8 is a diagram illustrating an example of a relationship between an effective magnetic flux of a permanent magnet type motor and a length of an overhang portion.
１ 回転子、２ 固定子、３ 磁石挿入孔、４ 永久磁
石、５ スリット、６回転子鉄心、７ 回転子鉄心磁極
部、８ 固定子鉄心、９ 固定子巻線、１０ａ，１０ｂ
回転子鉄心オーバーハング部、１１ 端板、１２ 回
転軸。1 rotor, 2 stators, 3 magnet insertion holes, 4 permanent magnets, 5 slits, 6 rotor core, 7 rotor core magnetic pole, 8 stator core, 9 stator winding, 10a, 10b
Rotor core overhang, 11 end plates, 12 rotating shafts.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 増本 浩二 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 (72)発明者 田島 庸賀 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 (72)発明者 加藤 政紀 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 Ｆターム(参考） 5H622 AA03 CA02 CA05 CA07 CA10 CA13 CB04 CB05 CB06 PP03 PP11 PP16 QB02 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Koji Masumoto, the inventor 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Co., Ltd. (72) Inventor Yoga Tajima 2-2-2, Marunouchi, Chiyoda-ku, Tokyo (72) Inventor Masanori Kato 2-3-2 Marunouchi, Chiyoda-ku, Tokyo F-term (reference) 5H622 AA03 CA02 CA05 CA07 CA10 CA13 CB04 CB05 CB06 PP03 PP11 PP16 QB02
Claims (7)
の内側に、回転子鉄心を配置し、前記回転子鉄心は複数
の磁石挿入孔を有し、この磁石挿入孔に永久磁石を収容
し、前記磁石挿入孔の外周側回転子鉄心磁極部にスリッ
トを有し、前記回転子鉄心が前記固定子鉄心より回転軸
方向に長い構造の永久磁石型モータにおいて、 前記固定子鉄心に対し前記回転子鉄心がオーバーハング
した回転子鉄心オーバーハング部側における回転軸方向
の回転子鉄心端部は、前記回転子鉄心中心部よりも漸次
前記スリットの前記回転子鉄心磁極部当たりの面積を小
さくしたことを特徴とする永久磁石型モータ。1. A rotor core is disposed inside a cylindrical stator core around which a coil is wound, and the rotor core has a plurality of magnet insertion holes, and a permanent magnet is inserted into the magnet insertion hole. The permanent magnet type motor having a structure in which the rotor core is accommodated and has a slit in the outer peripheral side rotor core magnetic pole portion of the magnet insertion hole, and the rotor core is longer in the rotation axis direction than the stator core. The end of the rotor core in the rotation axis direction on the rotor core overhang portion side where the rotor core overhangs has a smaller area per rotor core magnetic pole portion of the slit than the rotor core center. A permanent magnet type motor characterized in that:
ける回転軸方向の回転子鉄心端部には、前記スリットを
設けないことを特徴とする請求項１記載の永久磁石型モ
ータ。2. The permanent magnet type motor according to claim 1, wherein the slit is not provided at an end of the rotor core in the rotation axis direction on the rotor core overhang portion side.
たりの面積を小さくする手段として、スリット数を減少
させることを特徴とする請求項１記載の永久磁石型モー
タ。3. The permanent magnet type motor according to claim 1, wherein the number of slits is reduced as a means for reducing the area of the slit per magnetic pole portion of the rotor core.
たりの面積を小さくする手段として、スリット巾を狭く
させることを特徴とする請求項１記載の永久磁石型モー
タ。4. The permanent magnet type motor according to claim 1, wherein the means for reducing the area of the slit per magnetic pole portion of the rotor core reduces the width of the slit.
両端でオーバーハングするよう配置したことを特徴とす
る請求項１記載の永久磁石型モータ。5. The permanent magnet type motor according to claim 1, wherein the rotor core is arranged to overhang at both ends with respect to the stator core.
前記回転子鉄心の回転軸方向の中心をオフセットして配
置し、回転子鉄心オーバーハング部の長い側における回
転軸方向の回転子鉄心端部のみ前記回転子鉄心中心部よ
りも漸次前記スリットの前記回転子鉄心磁極部当たりの
面積を小さくしたことを特徴とする請求項１記載の永久
磁石型モータ。6. A center of the stator core in a rotation axis direction,
The center of the rotor core in the rotation axis direction is offset and disposed, and only the rotor core end in the rotation axis direction on the long side of the rotor core overhang portion is gradually shifted from the rotor core center portion than the rotor core center portion. 2. The permanent magnet motor according to claim 1, wherein an area per rotor magnetic pole portion is reduced.
片端でオーバーハングするよう配置したことを特徴とす
る請求項１記載の永久磁石型モータ。7. The permanent magnet motor according to claim 1, wherein the rotor core is arranged to overhang at one end with respect to the stator core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27465498A JP3490307B2 (en) | 1998-09-29 | 1998-09-29 | Permanent magnet type motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27465498A JP3490307B2 (en) | 1998-09-29 | 1998-09-29 | Permanent magnet type motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000116044A true JP2000116044A (en) | 2000-04-21 |
| JP3490307B2 JP3490307B2 (en) | 2004-01-26 |
Family
ID=17544711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27465498A Expired - Lifetime JP3490307B2 (en) | 1998-09-29 | 1998-09-29 | Permanent magnet type motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3490307B2 (en) |
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| JP2002084690A (en) * | 2000-02-09 | 2002-03-22 | Mitsubishi Heavy Ind Ltd | Electric motor |
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| JP2009261063A (en) * | 2008-04-14 | 2009-11-05 | Nishishiba Electric Co Ltd | Permanent-magnet rotary electric machine |
| JP2012244645A (en) * | 2011-05-16 | 2012-12-10 | Daikin Ind Ltd | Motor |
| JP2013505695A (en) * | 2009-09-18 | 2013-02-14 | ブルサ エレクトロニック アーゲー | Permanent magnet excitation type synchronous machine with embedded magnet |
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| EP1710891A1 (en) * | 2005-04-04 | 2006-10-11 | LG Electronics Inc. | Motor |
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| JP2013505695A (en) * | 2009-09-18 | 2013-02-14 | ブルサ エレクトロニック アーゲー | Permanent magnet excitation type synchronous machine with embedded magnet |
| JP2012244645A (en) * | 2011-05-16 | 2012-12-10 | Daikin Ind Ltd | Motor |
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